package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceimpl implements ShoppingCartService {

    @Autowired
  private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {

//判断数据是否已经存在
       ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
 List<ShoppingCart> list= shoppingCartMapper.list(shoppingCart);

Long userId = BaseContext.getCurrentId();
shoppingCart.setUserId(userId);

        //如果存在，只需update一下
if(list != null&&list.size()>0){
    //说明存在，要更新一下数量
    ShoppingCart shoppingCart1 = list.get(0);
    shoppingCart1.setNumber(shoppingCart1.getNumber()+1);
    shoppingCartMapper.updateNumberById(shoppingCart1);


}else {
//添加进购物车需要知道名字和图片路径等等，因此需要知道此次传进来的是菜品还是套餐

    Long dishId = shoppingCartDTO.getDishId();
    Long setmealId = shoppingCart.getSetmealId();

    if(dishId!=null){

        //传进来是菜品
        Dish dish = dishMapper.getById(dishId);
        shoppingCart.setName(dish.getName());
        shoppingCart.setImage(dish.getImage());
        shoppingCart.setAmount(dish.getPrice());


//111


    }else {
        Setmeal setmeal = setmealMapper.getById(setmealId);
shoppingCart.setAmount(setmeal.getPrice());
shoppingCart.setName(setmeal.getName());
shoppingCart.setImage(setmeal.getImage());



        //传进来是套餐
    }
    shoppingCart.setNumber(1);
    shoppingCart.setCreateTime(LocalDateTime.now());
    shoppingCartMapper.insert(shoppingCart);
    log.info("添加购物车成功");
}





    }

    @Override
    public List<ShoppingCart> list() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(userId).build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void delete() {
        Long currentId = BaseContext.getCurrentId();

        shoppingCartMapper.deleteById(currentId);


    }

    @Override
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {

        ShoppingCart shoppingCart =new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list != null && list.size() > 0){
            shoppingCart = list.get(0);

            Integer number = shoppingCart.getNumber();
            if(number == 1){
                //当前商品在购物车中的份数为1，直接删除当前记录
                shoppingCartMapper.deleteByIdone(shoppingCart.getId());
            }else {
                //当前商品在购物车中的份数不为1，修改份数即可
                shoppingCart.setNumber(shoppingCart.getNumber() - 1);
                shoppingCartMapper.updateNumberById(shoppingCart);
            }
        }



    }
}
